Curing bags for repairing tires



July 12, 1960 A. FEIST ET' L CURING BAGS FOR REPAIRING TIRES OriginalFiled June 8, 1956 j. 26

INVENTORS DELBERT E. TAYLOR ANTON F EI5T United States Patent 2,944,290CURING BAGS FOR REPAIRING TIRES Anton Feist, Yakima, wash, and DelbertE. Taylor, Portland, 0reg., assiguors, by mesne assignments, to UnitedStates Rubber Company, New York, N.Y., a corporation of New Jersey 4Claims. (CI. 18-45 The present invention relates to curing bags forrepairing tire casings and more particularly to such devices which areadapted for the curing of repairs within tires of the type having largecross sectional area and relatively small rim or head diameters.

The primary object of the invention is to provide a curing bag that canbe collapsed for placing the same into the tire or removing the samefrom the tire.

Another object of the invention is to provide a curing bag that can beplaced within the tire in repair work such that it will not displace therepair materials by having to spread the beads of the tire too farapart, as in the case of present day one piece curing bags.

Our new and improved curing bag can be collapsed and disassembled whileplacing the same into the tire or removing the same therefrom.

Other objects and advantages will become apparent in the followingspecification when considered in the light of the attached drawings, inwhich:

Figure 1 is a fragmentary transverse section through the tire, includingthe curing bag assembly, the outside curing mold being illustrated bybroken lines.

Figure 2 is a fragmentary perspective of the tire, illustrating thecuring bag assembly partially installed 2,944,290 Patented July 12, 1960Dowel pins 24 are provided inone of the flanges 19 for aligning theframe members 15 within the tire 10. The frame members 15 and the bag 20are held within the tire 10 by the bracing 25 indicated by broken linesand engaging the underside of a cross member 26, forming part of theouter mold structure 14.

The expansion turnbuckles 27 have bifurcated ends 28 formed on thethreaded bolts 29 and ,are adapted to expand the space within the framemembers 15 to fit. the inner contour of the tire 10,. and to take thecompression pressure which will be exerted by thebag 20 while steam orother curing medium is being. circulated in and out of the bag 20. Oneof the turnbuckles 27 may be located adjacent each end of the curing bagassembly.

We will now describe how our new 'and improved curing bag is applied toa casing of a tire 10 to be repaired. Referring to Figures 2 and 5, thebag 20 is brought into place as indicated in these figures within thetire 10. Next, one of the frames 15 is set into the tire 10 straddlingthe bag 20, after which the oppositely disposed frame member 15 isdropped in, as best illustrated in Figure 5, and brought into positionas shown in Figure 1. The bag 20 is then inflated by steam or othercuring medium used for this purpose through the valve 21. In case ofsteam being used, the steam can enter one end of the bag 20 and leaveits opposite end, maintaining the bag 20 and casing 10 at the propertemperature for vulcanizing the repair being made.

Having thus described the preferred embodiment of the invention, itshould be understood that numerous modifications and structuraladaptations may be resorted to without departing from the scope of theappended claims.

within the tire shown partially broken away and in sec- 7 within thetire after the bag has been installed within the tire.

Referring now to the drawings in detail wherein like reference numeralsindicate like parts throughout the several figures, the referencenumeral 10 indicates a tire to be repaired. The tire 10 has the-usualbeads 11 and the tread 12. In these drawings, we have only illustratedthe tire by a sectional view, covering both the fabric'and rubber partof the casing, eliminating the detail of structure or the repair beingplaced in the tire for convenience of illustration. The broken lines 13and 14 illustrate the position of the mold in which the tire casing isbeing repaired, and has nothing to do with the present invention, asvarious types of molds are used.

The invention consists of a pair of rigid frame members 15 shaped toconform to the inner shape of the tire casing 10. The frame members 15have relatively thin walls 16, bordered by end flanges 17 and outwardlyextending flanges 18. Inwardly extending flanges 19 are formed on theopposite edge of the frame members 15.

The space between the flanges 17 and 18 is adapted to receive a flexiblebag 20. The bag 20 is adapted to be inflated by steam, air or othercuring medium. Valves 21 and 22 admit the gaseous material to the bag20.. The valves 21 and 22 pass through the openings 23 of one of theframe members 15. a

This application is. a continuation of our application Serial No.590,281, filed June 8, 1956.

Having thus described our invention, what we claim and desire to protectby Letters Patent is:

1. A curing bag assembly for tire repairing comprising a pair oflongitudinally curved foundation members having a semi-cylindrical crosssection, said foundation members normally having their lower edges inabutting relation, interengaging means formed on said lower abuttingedges of said foundation members for holding said edges of said membersin alignment, outwardly extending flanges formed' on the otherperipheral edges of said foundation members, adjustable means extendingbetween the upper edges of said foundation members for maintaining saidupper edges in spaced aligned relation, a curing bag overlying saidfoundation members between said outwardly extending flanges, and meansfor circulating a curing medium through said bag, whereby the bag andtire may be maintained at a proper temperature during the vulcanizationof the repair.

2. A device as claimed in claim 1 wherein the adjustable means formaintaining said opposite edges in spaced aligned relationcompriseturnbuckles positioned between said edges and in engagement therewith.

3. A curing bag assembly for tire repairing comprising a pair ofthin-walled longitudinally curved foundation members having asemi-cylindrical cross section, said foundation members normally havingtheir lower edges in abutting relation, upstanding flanges integrallyformed on said lower abutting edges of said foundation Wardly extendingflanges, and means for circulating a curing medium through said bag,whereby the bag and tirernay be maintainedat a proper temperature duringthe vulcanization of the repair.; i g Y I k A curing bag assembly fortire repairing comprising a pair of walled longitudinally curvedfoundationfmembers having a semi-cylindrical cross section, one of saidfoundation members having a pair of apertures extending therethrough,said foundation members normally having their lower edges in abuttingrelation, upstanding flanges integrally formed on said lower abutting'edges of said foundation members; outwardly extending flanges integrallyformed on the other peripheral edges of said foundation members, apairof expansion turnbuekl es each having bifurcated ends, saidturnbuckles 15 1,417,701

extending between the upper edges of said foundation members maintainingsaid upper edges in spaced aligned relation, means bracing said assemblywithin said tire, a relatively thin arcuate curing bag overlying saidfoundation members between said outwardly extending flanges, a pair ofvalve members mounted on said bag, said valve members extending throughsaid apertures whereby said valve members may be conneetedto supply anddischarge lines for circulating a curing medium through said bag.

References Iitedin the t tle of this patent UNITED STATES PATENTS1,162,535 Willey Nev. 30, 1915 Trump May 30, 1922

